Date: Thu, 27 Aug 1998 09:05:02 GMT From: "David O'Brien" <obrien@NUXI.com> To: FreeBSD-gnats-submit@FreeBSD.ORG Subject: kern/7754: kernel panics if NFS server uses LKM vs. compiled in NFS support Message-ID: <199808270905.JAA03277@dragon.nuxi.com>
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>Number: 7754
>Category: kern
>Synopsis: kernel panics if NFS server uses LKM vs. compiled in NFS support
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Thu Aug 27 02:10:00 PDT 1998
>Last-Modified:
>Originator: David O'Brien
>Organization:
The FreeBSD Project
>Release: FreeBSD 3.0-19980804-SNAP i386
>Environment:
kernel compiled with "DIAGNOSTICS"
>Description:
My NFS server panics if I use the NFS LKM vs. statically
compiling in NFS support. I've also tested this with a -CURRENT
src/sys and src/lkm of 25-Aug-1998, and get the same results.
30 box is exporting /FBSD/CVS-repository
227 box is accessing it via AMD using /net/foo/FBSD/CVS-repository
30 box panics when I:
227box# cd /net/foo/FBSD/CVS-repository ; du
Here are two ``gdb where'' outputs:
(kgdb) core-file /var/crash/vmcore.0
IdlePTD 9916416
initial pcb at 1f48c4
panicstr: zone: entry not free
panic messages:
---
panic: zone: entry not free
---
#0 boot (howto=256) at ../../kern/kern_shutdown.c:286
286 dumppcb.pcb_cr3 = rcr3();
(kgdb) where
#0 boot (howto=256) at ../../kern/kern_shutdown.c:286
#1 0xf0119ad3 in panic (fmt=0xf01a1982 "zone: entry not free")
at ../../kern/kern_shutdown.c:427
#2 0xf01a1a3b in zerror (error=1) at ../../vm/vm_zone.c:442
#3 0xf013e898 in namei (ndp=0xf5622eb0) at ../../vm/vm_zone.h:91
#4 0xf01450a4 in stat (p=0xf557ef80, uap=0xf5622f94)
at ../../kern/vfs_syscalls.c:1580
#5 0xf01b3018 in syscall (frame={tf_es = 39, tf_ds = 39, tf_edi = 0,
tf_esi = 1, tf_ebp = -272638404, tf_isp = -178114588,
tf_ebx = -272638384, tf_edx = 903659280, tf_ecx = 7, tf_eax = 188,
tf_trapno = 7, tf_err = 7, tf_eip = 537344529, tf_cs = 31,
tf_eflags = 582, tf_esp = -272639144, tf_ss = 39})
at ../../i386/i386/trap.c:1031
#6 0x20073a11 in ?? ()
#7 0x1843 in ?? ()
#8 0x1099 in ?? ()
(kgdb)
(kgdb) core-file /var/crash/vmcore.1
IdlePTD 9916416
initial pcb at 1f48c4
panicstr: zone: entry not free
panic messages:
---
panic: zone: entry not free
---
#0 boot (howto=256) at ../../kern/kern_shutdown.c:286
286 dumppcb.pcb_cr3 = rcr3();
(kgdb) where
#0 boot (howto=256) at ../../kern/kern_shutdown.c:286
#1 0xf0119ad3 in panic (fmt=0xf01a1982 "zone: entry not free")
at ../../kern/kern_shutdown.c:427
#2 0xf01a1a3b in zerror (error=1) at ../../vm/vm_zone.c:442
#3 0xf013e898 in namei (ndp=0xf56e9ef8) at ../../vm/vm_zone.h:91
#4 0xf014754d in vn_open (ndp=0xf56e9ef8, fmode=1, cmode=384)
at ../../kern/vfs_vnops.c:125
#5 0xf0143d8b in open (p=0xf557d180, uap=0xf56e9f94)
at ../../kern/vfs_syscalls.c:901
#6 0xf01b3018 in syscall (frame={tf_es = 39, tf_ds = 39, tf_edi = 60,
tf_esi = 903629812, tf_ebp = -272639440, tf_isp = -177299484,
tf_ebx = 5812, tf_edx = 15, tf_ecx = 0, tf_eax = 5, tf_trapno = 7,
tf_err = 7, tf_eip = 537356961, tf_cs = 31, tf_eflags = 582,
tf_esp = -272639560, tf_ss = 39}) at ../../i386/i386/trap.c:1031
#7 0x20076aa1 in ?? ()
#8 0x1c0a in ?? ()
#9 0x1096 in ?? ()
(kgdb)
vm/vm_zone.h:91 is
98 #if defined(DIAGNOSTIC)
90 if (((void **) item)[1] != (void *) ZENTRY_FREE)
91 zerror(ZONE_ERROR_NOTFREE);
92 ((void **) item)[1] = 0;
vm/vm_zone.c:442 is
442 panic(msg); from void zerror(int error);
kern/vfs_vnops.c:125 is
123 ndp->ni_cnd.cn_flags =
124 ((fmode & O_NOFOLLOW) ? NOFOLLOW : FOLLOW) | LOCKLEAF;
125 error = namei(ndp);
126 if (error)
kern/vfs_syscalls.c:1580 is
1578 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | NOOBJ, UIO_USERSPACE,
1579 SCARG(uap, path), p);
1580 if (error = namei(&nd))
1581 return (error);
>How-To-Repeat:
>Fix:
>Audit-Trail:
>Unformatted:
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